What is the most common gardening mistake you see on the coast?MG: Picking plants that are ill-suited to their site just because you love them. If you love gardenias, think about why you love them. Is it the scent? If so, pick something else that smells lovely but holds up better in salt, sand, sun, and windburn, like jasmine. If what you love is a shiny green leaf, try Carmel creeper.

Which seaside plants do you love?MG: Coast to coast, there are "wow" grasses such as Canyon Prince wild rye and blue oat grass that are the unsung heroes of the garden—they capture light, provide movement in sea breezes, and last through all seasons.

Tell us your top tip for container gardens by the beach.MG: Add pebbles or sea glass on top of the soil—it helps hold the plant down in strong coastal winds.

What is your favorite statement piece in a coastal garden?MG: I like to use something from the natural environment, like one to three boulders set together as though they were a sculpture. Buy boulders from a local stone supplier for an authentic sense of place.

TAKE FIVEWe asked Grace to share the products and places she's loving right now.

Picture Book (pictured above) "Debra Prinzing's garden books are beautifully written and illustrated, and full of great ideas." The 50 Mile Bouquet: Seasonal, Local and Sustainable Flowers, $14; amazon.com

Go-To Plant (pictured above) "Succulents take salt air and put up with wind, so they're great at the ocean's edge."